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Rosco Maximizer 2B Asphalt Distributor

7-11

Maintenance

DO NOT SMOKE around the machine

Fuel, asphalt material and the fumes from either

can explode when exposed to flame or heat from

smoking or other sources

1 . The hydraulic reservoir is located on the driver side

of the vehicle . Check the sight gauge at the start
of each working day . The oil level should be at the
center of the sight glass to allow room for expansion
as the oil warms during operation .

2 .

Add oil through the filler cap on the side of the tank.
Clean the cap and filler neck before filling to be

sure that no dirt or contaminants enter the tank .
Hydrostatic systems will fail in a short time if the oil
is not clean . Watch the sight glass when adding oil .
Add until the oil level is in the center of the gauge .

3 . The reservoir has a temperature switch that is set

at 210° F (99° C) . The sight gauge also displays
the hydraulic oil temperature . Check the sight
gauge if the control panel hydraulic temperature
indicator comes on . Check the temperature to
assure operating temperature is below 225° F
(107° C) . If the temperature exceeds 225° F (107°
C), check the system for a failing motor or pump
(see

Troubleshooting

in Section 8) . Keep the tank

exterior clean to maximize heat dissipation which
will help cool the oil in the system .

4 . Change the oil in the reservoir annually or every

400 hours, whichever comes first. The drain plug

is located in the bottom of the tank . Drain the oil
when the system is warm or hot to remove the most
contaminants . DO NOT SMOKE when working
around hot oil . Use a large pail or container to
collect the used oil . Dispose of the used oil in an
approved manner . Refer to

Table 7-2 Hydraulic

Fluids Chart

for recommended grades and

manufacturers . Watch the sight gauge .

NOTE: Contaminants can enter the system when

hydraulic cylinder rods are retracted . The asphalt
can get past the seals and can be dissolved
by the oil . Changing the oil will remove these
contaminants and prevent gum deposits from
building up on the internal components .

1 . Clean the internal asphalt system after each use

by going through the Reverse Suction and Clean-
out modes, (see

Modes Of Operation

in Section

6) .

Keep the internal components clean to prevent

clogging of components and asphalt set-up in the
nozzles .

NOTE: Some residue will always remain on the inner

surfaces of the plumbing, but it will liquefy when

the hot asphalt flows through the system in the

SPRAY/BAR CIRCULATE mode .

2 . Clean all spraybar components at the end of each

working day or more frequently if required .

3 . Clean all joints and pivots of the asphalt, hydraulic

and air systems to prevent caked dirt or asphalt
from interfering with their function . Be sure to
clean the exposed shafts of each air and hydraulic
cylinder to prevent caked asphalt from being drawn
into the system when the cylinder rod is retracted .

4 .

After cleaning, visually check all hoses, fittings and

clamps for leaks or loose components . Leaks can
affect the performance and function of the machine
by causing uneven asphalt application and wasted
asphalt .

Do not operate the unit with leaking

or damaged parts Leaks can result in hot asphalt
spilling on the machine or the operator, creating a
hazardous condition

5 . Check that all pivots, hinges and joints are tight and

can move freely . Free up all points that are binding .
Check that all fasteners are tight . Do not operate
with loose components .

6 . Refer to the Bolt Torque Charts and review torque

specifications. Maintain bolts at their specified

torque .

Hydraulic System

Hydraulic power is used to drive the asphalt pump,
raise, and move the spraybar . A direct connection to the
engine or a PTO drive from the transmission is used to
power a variable displacement piston pump which in
turn drives the asphalt pump and auxiliary functions . The

hydraulic motor powering the asphalt pump is a fixed

displacement high torque low speed motor . To service
and maintain the system, follow this procedure:

Always wear protective clothing,

gloves and a face shield. Hydraulic fluid under

pressure can penetrate skin and cause serious
injury

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